A. Create a JAVA Class Square that inherits Shape with these attribute:
1. sideLength:double

B. Create 2 constructors:
1. Default or without parameter Constructor
2. Constructor with parameter passing the three attributes

C. Encapsulate all fields

D. Override the ToString():string

F. Create a computeArea():double. Area of Square

Test the Class
instantiate object sq as new Square(), then print
instantiate object sq1 as new Shape(w/ param) then print